Garmin Striker Cast Castable Fishfinder Sensor With GPSThe Garmin STRIKER Cast GPS Castable Sonar Device streams real time sonar to your iPhone or Android, helping you see fish and structure beneath the surface. Built in GPS with QuickDraw Contours lets you map productive spots for more informed casts. Wireless streaming range: Streams sonar up to 60 m (200') from the device to your smartphone for real time targets and underwater structure. Integrated GPS with QuickDraw Contours: Create custom 1' contour